If one Gmail shortcut isn't enough to satisfy you, Shift + / (or simply '?') is the mother of them all. What does it do? It tells you every shortcut in Gmail so you'll never go shortcut-hungry again.

That's pretty much it. When you type a question mark in Gmail (and your cursor isn't in a text input) you'll get a shortcut cheat sheet on top of your inbox or whatever you've loaded up into your account. (Bonus fake tip: when you're looking at disgusting, inappropriate images at work, Shift + / will cover them up—or at least sort of, because the overlay is translucent. It's super fast and sort of effective!) For a demonstration, check out the video above.

Note: For those of you who haven't enabled shortcuts in Gmail, just invoke the question-mark shortcut and click the Enable link at the top of the shortcuts cheatsheet. (Or pop into your Settings panel and click on General. You should find an option to enable keyboard shortcuts here, letting you in on all the timesaving fun.)

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